Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2022, 2024 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU General Public License as published by the Free Software
7 : Foundation; either version 3, or (at your option) any later version.
8 :
9 : TALER is distributed in the hope that it will be useful, but WITHOUT ANY
10 : WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11 : A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12 :
13 : You should have received a copy of the GNU General Public License along with
14 : TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
15 : */
16 : /**
17 : * @file exchangedb/pg_select_kyc_attributes.c
18 : * @brief Implementation of the select_kyc_attributes function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "platform.h"
22 : #include "taler_error_codes.h"
23 : #include "taler_dbevents.h"
24 : #include "taler_pq_lib.h"
25 : #include "pg_select_kyc_attributes.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #get_attributes_cb().
31 : */
32 : struct GetAttributesContext
33 : {
34 : /**
35 : * Function to call per result.
36 : */
37 : TALER_EXCHANGEDB_AttributeCallback cb;
38 :
39 : /**
40 : * Closure for @e cb.
41 : */
42 : void *cb_cls;
43 :
44 : /**
45 : * Plugin context.
46 : */
47 : struct PostgresClosure *pg;
48 :
49 : /**
50 : * Key of our query.
51 : */
52 : const struct TALER_NormalizedPaytoHashP *h_payto;
53 :
54 : /**
55 : * Flag set to #GNUNET_OK as long as everything is fine.
56 : */
57 : enum GNUNET_GenericReturnValue status;
58 :
59 : };
60 :
61 :
62 : /**
63 : * Invoke the callback for each result.
64 : *
65 : * @param cls a `struct GetAttributesContext *`
66 : * @param result SQL result
67 : * @param num_results number of rows in @a result
68 : */
69 : static void
70 7 : get_attributes_cb (void *cls,
71 : PGresult *result,
72 : unsigned int num_results)
73 : {
74 7 : struct GetAttributesContext *ctx = cls;
75 :
76 9 : for (unsigned int i = 0; i < num_results; i++)
77 : {
78 : struct GNUNET_TIME_Timestamp collection_time;
79 : struct GNUNET_TIME_Timestamp expiration_time;
80 : size_t enc_attributes_size;
81 : void *enc_attributes;
82 : char *provider;
83 2 : struct GNUNET_PQ_ResultSpec rs[] = {
84 2 : GNUNET_PQ_result_spec_string ("provider_name",
85 : &provider),
86 2 : GNUNET_PQ_result_spec_timestamp ("collection_time",
87 : &collection_time),
88 2 : GNUNET_PQ_result_spec_timestamp ("expiration_time",
89 : &expiration_time),
90 2 : GNUNET_PQ_result_spec_variable_size ("encrypted_attributes",
91 : &enc_attributes,
92 : &enc_attributes_size),
93 : GNUNET_PQ_result_spec_end
94 : };
95 :
96 2 : if (GNUNET_OK !=
97 2 : GNUNET_PQ_extract_result (result,
98 : rs,
99 : i))
100 : {
101 0 : GNUNET_break (0);
102 0 : ctx->status = GNUNET_SYSERR;
103 0 : return;
104 : }
105 2 : ctx->cb (ctx->cb_cls,
106 : ctx->h_payto,
107 : provider,
108 : collection_time,
109 : expiration_time,
110 : enc_attributes_size,
111 : enc_attributes);
112 2 : GNUNET_PQ_cleanup_result (rs);
113 : }
114 : }
115 :
116 :
117 : enum GNUNET_DB_QueryStatus
118 7 : TEH_PG_select_kyc_attributes (
119 : void *cls,
120 : const struct TALER_NormalizedPaytoHashP *h_payto,
121 : TALER_EXCHANGEDB_AttributeCallback cb,
122 : void *cb_cls)
123 : {
124 7 : struct PostgresClosure *pg = cls;
125 7 : struct GNUNET_PQ_QueryParam params[] = {
126 7 : GNUNET_PQ_query_param_auto_from_type (h_payto),
127 : GNUNET_PQ_query_param_end
128 : };
129 7 : struct GetAttributesContext ctx = {
130 : .cb = cb,
131 : .cb_cls = cb_cls,
132 : .pg = pg,
133 : .h_payto = h_payto,
134 : .status = GNUNET_OK
135 : };
136 : enum GNUNET_DB_QueryStatus qs;
137 :
138 7 : PREPARE (pg,
139 : "select_kyc_attributes",
140 : "SELECT "
141 : " lp.provider_name"
142 : ",ka.collection_time"
143 : ",ka.expiration_time"
144 : ",ka.encrypted_attributes"
145 : " FROM kyc_attributes ka"
146 : " JOIN legitimization_processes lp"
147 : " ON (ka.legitimization_serial = lp.legitimization_process_serial_id)"
148 : " WHERE ka.h_payto=$1");
149 7 : qs = GNUNET_PQ_eval_prepared_multi_select (
150 : pg->conn,
151 : "select_kyc_attributes",
152 : params,
153 : &get_attributes_cb,
154 : &ctx);
155 7 : if (GNUNET_OK != ctx.status)
156 0 : return GNUNET_DB_STATUS_HARD_ERROR;
157 7 : return qs;
158 : }
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